Small changes can make a great difference

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dc.contributor.authorGaitero, Juan J.
dc.contributor.authorCampillo, Igor
dc.contributor.authorMondal, Paramita
dc.contributor.authorShah, Surendra P.
dc.contributor.institutionTecnalia Research & Innovation
dc.date.accessioned2024-07-24T12:08:37Z
dc.date.available2024-07-24T12:08:37Z
dc.date.issued2010-01-12
dc.description.abstractFour different types of commercially available silica nanoparticles were added to ordinary portland cement pastes to study their effects. The subsequent multiscale characterization of the material revealed that the addition of the nanoparticles induced a pozzolanic reaction that increased the amount of calcium silicate hydrate (C-S-H) gel in the paste to the detriment of portlandite. This had important implications for the hydration kinetics and the microstructure of the paste, including an increase in the initial hydration rate. A reduction of the overall porosity was also observed. The C-S-H gel of the pastes with nanosilica also showed some particular features, such as greater aluminum content and longer silicate chains. This was especially relevant because nanoindentation measurements and atomistic calculations showed that this was bound to an improvement in the mechanical properties of the C-S-H gel itself. Finally, the sum of all these factors resulted in pastes with 30% more compressive strength, which proved that, effectively, small changes can make a great difference.en
dc.description.statusPeer reviewed
dc.format.extent5
dc.identifier.citationGaitero , J J , Campillo , I , Mondal , P & Shah , S P 2010 , ' Small changes can make a great difference ' , Transportation Research Record , no. 2141 , pp. 1-5 . https://doi.org/10.3141/2141-01
dc.identifier.doi10.3141/2141-01
dc.identifier.issn0361-1981
dc.identifier.urihttps://hdl.handle.net/11556/3887
dc.identifier.urlhttp://www.scopus.com/inward/record.url?scp=78651315816&partnerID=8YFLogxK
dc.language.isoeng
dc.relation.ispartofTransportation Research Record
dc.rightsinfo:eu-repo/semantics/restrictedAccess
dc.subject.keywordsCivil and Structural Engineering
dc.subject.keywordsMechanical Engineering
dc.titleSmall changes can make a great differenceen
dc.typejournal article
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